diff --git a/.github/workflows/check.yaml b/.github/workflows/check.yaml
new file mode 100644
index 0000000..99f55a5
--- /dev/null
+++ b/.github/workflows/check.yaml
@@ -0,0 +1,54 @@
+name: Check
+
+on: [push]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    container:
+      image: ghcr.io/${{ github.repository }}-builder:ci_pr
+    steps:
+      - name: Check out repository code
+        uses: actions/checkout@v4
+
+      - name: Build ouichefs
+        run: make -C /usr/src/linux-6.5.7/ M=$PWD
+
+      - name: Prepare disk image
+        run: make -C mkfs/ img IMG=a.img
+
+      - name: Cache built module
+        uses: actions/cache/save@v4
+        with:
+          path: ./
+          key: ${{ github.sha }}
+
+  check:
+    needs: build
+    runs-on: ubuntu-latest
+    container:
+      image: ghcr.io/${{ github.repository }}-builder:ci-pr
+    strategy:
+      matrix:
+        checks: [ouichefs_basic_behavior, ouichefs_fio]
+    timeout-minutes: 10
+    steps:
+      - name: Restore built module
+        uses: actions/cache/restore@v4
+        with:
+          key: ${{ github.sha }}
+          path: ./
+
+      - name: Prepare images
+        run: cp mkfs/a.img mkfs/b.img
+
+      - name: Check ${{ matrix.checks }}...
+        run: >
+          vng
+          --verbose
+          --run=/usr/src/linux-6.5.7
+          --qemu-opts='-drive file=mkfs/a.img,format=raw,if=virtio'
+          --qemu-opts='-drive file=mkfs/b.img,format=raw,if=virtio'
+          --exec='make -C /lib/modules/\`uname -r\`/build M=$PWD modules_install
+          && source ./evaluation.sh
+          && check_${{ matrix.checks }}'
diff --git a/.github/workflows/container.yaml b/.github/workflows/container.yaml
new file mode 100644
index 0000000..2c6b707
--- /dev/null
+++ b/.github/workflows/container.yaml
@@ -0,0 +1,43 @@
+name: Create and publish a Docker image
+
+on:
+  push:
+    paths:
+      - "Dockerfile"
+
+env:
+  REGISTRY: ghcr.io
+
+jobs:
+  build-and-push-image:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+      id-token: write
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Log in to the Container registry
+        uses: docker/login-action@v3
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Extract metadata (tags, labels) for Docker
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ${{ env.REGISTRY }}/${{ github.repository }}-builder
+
+      - name: Build and push Docker image
+        id: push
+        uses: docker/build-push-action@v6
+        with:
+          context: .
+          push: ${{ github.event_name != 'pull_request' }}
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
diff --git a/Dockerfile b/Dockerfile
new file mode 100644
index 0000000..774dd79
--- /dev/null
+++ b/Dockerfile
@@ -0,0 +1,17 @@
+# The virtme-ng present in the latest LTS at the time of writing has a bug that causes
+# the VM to shutdown unexpectedly.
+FROM ubuntu:25.04
+
+# deb-src repositories are required for `apt-get build-dep`.
+RUN sed -i 's/Types: deb/Types: deb deb-src/g' /etc/apt/sources.list.d/ubuntu.sources
+
+# iproute2, kbd and udev are required by virtme-ng
+# nodejs is needed for the GitHub Actions cache scripts
+RUN apt-get update && \
+    DEBIAN_FRONTEND=noninteractive apt-get install -y virtme-ng iproute2 kbd udev fio nodejs && \
+    apt-get build-dep -y --no-install-recommends linux
+WORKDIR /usr/src/
+ADD https://cdn.kernel.org/pub/linux/kernel/v6.x/linux-6.5.7.tar.xz /usr/src/
+RUN tar xf linux-6.5.7.tar.xz
+WORKDIR /usr/src/linux-6.5.7/
+RUN vng --configitem CONFIG_DEBUG_KMEMLEAK=y --build
diff --git a/evaluation.sh b/evaluation.sh
new file mode 100644
index 0000000..7ceb85d
--- /dev/null
+++ b/evaluation.sh
@@ -0,0 +1,526 @@
+#!/bin/bash -e
+modulename=ouichefs
+
+sysfs="/sys/fs/ouichefs"
+# sysfs="/sys/ouichefs"
+
+exit_fail() {
+	echo "test failed: $1"
+	exit 1
+}
+
+# this script requires two drives to be attached to the VM
+# under /dev/vda and /dev/vdb
+mnta=/tmp/mnt1
+mntb=/tmp/mnt2
+mkdir -p $mnta
+mkdir -p $mntb
+
+check_ouichefs_basic_behavior() {
+	set -x
+	modprobe $modulename
+
+	mount /dev/vda $mnta
+	cd $mnta
+	rm -fr $mnta/*
+
+	mkdir dir
+	echo "some data" > dir/file
+	echo "some data" > file
+	echo "some data" > file2
+	mv file2 dir
+	echo "some more data" > file
+
+	ls -Ril > /dev/null
+	rm file
+	rm -fr dir
+	ls -Ril > /dev/null
+
+	rm -fr $mnta/*
+	touch file{1..65}
+	mkdir dir2
+	mv file{1..65} dir2
+	rm -fr $mnta/*
+
+	echo "data" > file
+	echo "data" >> file
+	echo "data" >> file
+	echo "data" >> file
+	echo "data" >> file
+	echo "data" >> file
+	echo "data" >> file
+	echo "data" >> file
+	echo "data" >> file
+	echo "data" >> file
+	echo "data" >> file
+	rm file
+
+	cd
+	umount $mnta
+	rmmod $modulename
+}
+
+check_ouichefs_fio() {
+	set -x
+	modprobe $modulename
+
+	mount /dev/vda $mnta
+	cd $mnta
+	rm -fr $mnta/*
+
+	echo "[global]
+nrfiles=10
+directory=$mnta
+size=16M
+runtime=20s
+ioengine=sync
+time_based
+bs=4k
+verify=sha1
+verify_fatal=1
+
+group_reporting
+
+[rw]
+rw=randrw
+numjobs=1
+
+[rwappend]
+file_append=1
+rw=randrw
+numjobs=1" > /tmp/workload.fio
+
+	fio -f /tmp/workload.fio > /dev/null
+	cd
+	rm -fr $mnta/*
+	umount $mnta
+	rmmod $modulename
+}
+
+check_sysfs_structure() {
+	set -x
+	modprobe $modulename
+
+	mount /dev/vda $mnta
+	mount /dev/vdb $mntb
+
+	for dev in vda vdb; do
+
+		if ! [ -d "$sysfs/$dev" ]; then
+			exit_fail "$sysfs/$dev not created!"
+		fi
+
+		for file in free_blocks used_blocks sliced_blocks total_free_slices files small_files total_data_size total_used_size efficiency ; do
+			variable="$sysfs/$dev/$file"
+			if ! [ -f "$variable" ]; then
+				exit_fail "$variable not created!"
+			fi
+			if ! cat "$variable" > /dev/null; then
+				exit_fail "error while reading ${variable}!"
+			fi
+		done
+	done
+
+	umount $mnta
+	umount $mntb
+
+	for dev in vda vdb; do
+		if [ -d "$sysfs/$dev" ]; then
+			exit_fail "$sysfs/$dev still present after unmount!"
+		fi
+	done
+
+	rmmod $modulename
+}
+
+check_simple_write() {
+	set -x
+	modprobe $modulename
+
+	mount /dev/vda $mnta
+	mount /dev/vdb $mntb
+
+	variable_used="$sysfs/vda/used_blocks"
+	variable_small_files="$sysfs/vda/small_files"
+	variable_free_slices="$sysfs/vda/total_free_slices"
+	variable_slices="$sysfs/vda/sliced_blocks"
+
+	# make sure there's at least 1 filled block allocated
+	dd if=/dev/urandom of=$mnta/file0 bs=48 count=1 2>/dev/null
+
+	if ! used_before=$(cat $variable_used); then
+		exit_fail "error while reading ${variable_used}!"
+	fi
+	if ! free_slices_before=$(cat $variable_free_slices); then
+		exit_fail "error while reading ${variable_free_slices}!"
+	fi
+	if ! slices_before=$(cat $variable_slices); then
+		exit_fail "error while reading ${variable_slices}!"
+	fi
+	if ! small_files_before=$(cat $variable_small_files); then
+		exit_fail "error while reading ${variable_small_files}!"
+	fi
+
+	# allocate a new file
+	dd if=/dev/urandom of="$mnta/file1" bs=4k count=1 2>/dev/null
+
+	if ! used_after=$(cat $variable_used); then
+		exit_fail "error while reading ${variable_used}!"
+	fi
+	if ! [ "$((used_before + 2))" -eq "$used_after"  ]; then
+		exit_fail ">error while counting $variable_used: $used_before $used_after"
+	fi
+
+	if ! used_before=$(cat $variable_used); then
+		exit_fail "error while reading ${variable_used}!"
+	fi
+
+	dd if=/dev/urandom of=$mnta/file2 bs=18 count=1 2>/dev/null
+	dd if=/dev/urandom of=$mnta/file3 bs=48 count=1 2>/dev/null
+	dd if=/dev/urandom of=$mnta/file4 bs=127 count=1 2>/dev/null
+
+	if ! used_after=$(cat $variable_used); then
+		exit_fail "error while reading ${variable_used}!"
+	fi
+	if ! slices_after=$(cat $variable_slices); then
+		exit_fail "error while reading ${variable_slices}!"
+	fi
+	if ! free_slices_after=$(cat $variable_free_slices); then
+		exit_fail "error while reading ${variable_free_slices}!"
+	fi
+	if ! small_files_after=$(cat $variable_small_files); then
+		exit_fail "error while reading ${variable_small_files}!"
+	fi
+	if ! [ "$((free_slices_before - 3))" -eq "$free_slices_after"  ]; then
+		exit_fail ">>error while counting $variable_free_slices: $free_slices_before $free_slices_after"
+	fi
+	if ! [ "$used_before" -eq "$used_after"  ]; then
+		exit_fail ">>error while counting $variable_used: $used_before $used_after"
+	fi
+	if ! [ "$((small_files_before + 3))" -eq "$small_files_after"  ]; then
+		exit_fail ">>error while counting $variable_small_files: $small_files_before $small_files_after"
+	fi
+	if ! [ "$((slices_after))" -eq "$slices_before"  ]; then
+		exit_fail ">>error while counting $variable_slices: $slices_before $slices_after"
+	fi
+
+	if ! slices_before=$(cat $variable_slices); then
+		exit_fail "error while reading ${variable_slices}!"
+	fi
+	for i in $(seq 45); do
+		dd if=/dev/urandom of="$mnta/_file$i" bs=128 count=1 2>/dev/null
+	done
+	if ! slices_after=$(cat $variable_slices); then
+		exit_fail "error while reading ${variable_slices}!"
+	fi
+	if ! [ "$((slices_after))" -eq "$((slices_before + 1))"  ]; then
+		exit_fail ">>error while counting $variable_slices: $slices_before $slices_after"
+	fi
+
+	umount $mnta
+	umount $mntb
+
+	for dev in vda vdb; do
+		if [ -d "$sysfs/$dev" ]; then
+			exit_fail "$sysfs/$dev still present after unmount!"
+		fi
+	done
+
+	rmmod $modulename
+}
+
+check_remove() {
+	set -x
+	modprobe $modulename
+
+	mount /dev/vda $mnta
+	mount /dev/vdb $mntb
+
+	variable_used="$sysfs/vda/used_blocks"
+	variable_small_files="$sysfs/vda/small_files"
+	variable_free_slices="$sysfs/vda/total_free_slices"
+	variable_slices="$sysfs/vda/sliced_blocks"
+
+	if ! used_before=$(cat $variable_used); then
+		exit_fail "error while reading ${variable_used}!"
+	fi
+	if ! slices_before=$(cat $variable_slices); then
+		exit_fail "error while reading ${variable_slices}!"
+	fi
+	if ! free_slices_before=$(cat $variable_free_slices); then
+		exit_fail "error while reading ${variable_free_slices}!"
+	fi
+	if ! small_files_before=$(cat $variable_small_files); then
+		exit_fail "error while reading ${variable_small_files}!"
+	fi
+
+	rm "$mnta/"file{0,2,3,4}
+
+	if ! used_after=$(cat $variable_used); then
+		exit_fail "error while reading ${variable_used}!"
+	fi
+	if ! slices_after=$(cat $variable_slices); then
+		exit_fail "error while reading ${variable_slices}!"
+	fi
+	if ! free_slices_after=$(cat $variable_free_slices); then
+		exit_fail "error while reading ${variable_free_slices}!"
+	fi
+	if ! small_files_after=$(cat $variable_small_files); then
+		exit_fail "error while reading ${variable_small_files}!"
+	fi
+
+	if ! [ "$used_before" -eq "$used_after"  ]; then
+		exit_fail ">>error while counting $variable_used: $used_before $used_after"
+	fi
+	if ! [ "$((small_files_before - 4))" -eq "$small_files_after"  ]; then
+		exit_fail ">>error while counting $variable_small_files: $small_files_before $small_files_after"
+	fi
+	if ! [ "$((slices_after))" -eq "$slices_before"  ]; then
+		exit_fail ">>error while counting $variable_slices: $slices_before $slices_after"
+	fi
+	if ! [ "$((free_slices_before + 4))" -eq "$free_slices_after"  ]; then
+		exit_fail ">>error while counting $variable_free_slices: $free_slices_before $free_slices_after"
+	fi
+
+	if ! slices_before=$(cat $variable_slices); then
+		exit_fail "error while reading ${variable_slices}!"
+	fi
+	for i in $(seq 1 44); do
+		rm "$mnta/_file$i"
+	done
+	if ! slices_after=$(cat $variable_slices); then
+		exit_fail "error while reading ${variable_slices}!"
+	fi
+	if ! [ "$((slices_after))" -eq "$((slices_before - 1))"  ]; then
+		exit_fail ">>error while counting $variable_slices: $slices_before $slices_after"
+	fi
+
+
+	umount $mnta
+	umount $mntb
+
+	for dev in vda vdb; do
+		if [ -d "$sysfs/$dev" ]; then
+			exit_fail "$sysfs/$dev still present after unmount!"
+		fi
+	done
+
+	rmmod $modulename
+}
+
+check_coexistence_trad_fs() {
+	set -x
+	modprobe $modulename
+
+	mount /dev/vda $mnta
+	mount /dev/vdb $mntb
+
+	dd if=/dev/urandom of=$mntb/file1 bs=128 count=1 2>/dev/null
+
+	variable_used="$sysfs/vdb/used_blocks"
+	variable_small_files="$sysfs/vdb/small_files"
+	variable_free_slices="$sysfs/vdb/total_free_slices"
+	variable_slices="$sysfs/vdb/sliced_blocks"
+
+	if ! used_before=$(cat $variable_used); then
+		exit_fail "error while reading ${variable_used}!"
+	fi
+	if ! slices_before=$(cat $variable_slices); then
+		exit_fail "error while reading ${variable_slices}!"
+	fi
+	if ! free_slices_before=$(cat $variable_free_slices); then
+		exit_fail "error while reading ${variable_free_slices}!"
+	fi
+	if ! small_files_before=$(cat $variable_small_files); then
+		exit_fail "error while reading ${variable_small_files}!"
+	fi
+
+	dd if=/dev/urandom of=$mntb/file3 bs=128 count=1 2>/dev/null
+
+	if ! used_after=$(cat $variable_used); then
+		exit_fail "error while reading ${variable_used}!"
+	fi
+	if ! slices_after=$(cat $variable_slices); then
+		exit_fail "error while reading ${variable_slices}!"
+	fi
+	if ! free_slices_after=$(cat $variable_free_slices); then
+		exit_fail "error while reading ${variable_free_slices}!"
+	fi
+	if ! small_files_after=$(cat $variable_small_files); then
+		exit_fail "error while reading ${variable_small_files}!"
+	fi
+	if ! [ "$((free_slices_before - 1))" -eq "$free_slices_after"  ]; then
+		exit_fail ">>error while counting $variable_free_slices: $free_slices_before $free_slices_after"
+	fi
+	if ! [ "$used_before" -eq "$used_after"  ]; then
+		exit_fail ">>error while counting $variable_used: $used_before $used_after"
+	fi
+	if ! [ "$((small_files_before + 1))" -eq "$small_files_after"  ]; then
+		exit_fail ">>error while counting $variable_small_files: $small_files_before $small_files_after"
+	fi
+	if ! [ "$((slices_after))" -eq "$slices_before"  ]; then
+		exit_fail ">>error while counting $variable_slices: $slices_before $slices_after"
+	fi
+
+
+	if ! slices_before=$(cat $variable_slices); then
+		exit_fail "error while reading ${variable_slices}!"
+	fi
+	if ! free_slices_before=$(cat $variable_free_slices); then
+		exit_fail "error while reading ${variable_free_slices}!"
+	fi
+	if ! small_files_before=$(cat $variable_small_files); then
+		exit_fail "error while reading ${variable_small_files}!"
+	fi
+
+	dd if=/dev/urandom of=$mntb/file3 bs=4k count=1 2>/dev/null
+
+	if ! slices_after=$(cat $variable_slices); then
+		exit_fail "error while reading ${variable_slices}!"
+	fi
+	if ! free_slices_after=$(cat $variable_free_slices); then
+		exit_fail "error while reading ${variable_free_slices}!"
+	fi
+	if ! small_files_after=$(cat $variable_small_files); then
+		exit_fail "error while reading ${variable_small_files}!"
+	fi
+	if ! [ "$((small_files_before - 1))" -eq "$small_files_after"  ]; then
+		exit_fail ">>error while counting $variable_small_files: $small_files_before $small_files_after"
+	fi
+	if ! [ "$((free_slices_before + 1))" -eq "$free_slices_after"  ]; then
+		exit_fail ">>error while counting $variable_free_slices: $free_slices_before $free_slices_after"
+	fi
+	if ! [ "$((slices_after))" -eq "$slices_before"  ]; then
+		exit_fail ">>error while counting $variable_slices: $slices_before $slices_after"
+	fi
+
+	umount $mnta
+	umount $mntb
+
+	for dev in vda vdb; do
+		if [ -d "$sysfs/$dev" ]; then
+			exit_fail "$sysfs/$dev still present after unmount!"
+		fi
+	done
+
+	rmmod $modulename
+}
+
+check_spanning_multiple_slices() {
+	set -x
+	modprobe $modulename
+
+	mount /dev/vda $mnta
+	mount /dev/vdb $mntb
+
+	variable_used="$sysfs/vdb/used_blocks"
+	variable_small_files="$sysfs/vdb/small_files"
+	variable_free_slices="$sysfs/vdb/total_free_slices"
+	variable_slices="$sysfs/vdb/sliced_blocks"
+
+	dd if=/dev/urandom of=$mntb/file1 bs=100 count=1 2>/dev/null
+
+	if ! used_before=$(cat $variable_used); then
+		exit_fail "error while reading ${variable_used}!"
+	fi
+	if ! slices_before=$(cat $variable_slices); then
+		exit_fail "error while reading ${variable_slices}!"
+	fi
+	if ! free_slices_before=$(cat $variable_free_slices); then
+		exit_fail "error while reading ${variable_free_slices}!"
+	fi
+	if ! small_files_before=$(cat $variable_small_files); then
+		exit_fail "error while reading ${variable_small_files}!"
+	fi
+
+	dd if=/dev/urandom of=$mntb/file2 bs=100 count=1 oflag=append conv=notrunc 2>/dev/null
+	dd if=/dev/urandom of=$mntb/file2 bs=128 count=1 oflag=append conv=notrunc 2>/dev/null
+
+	if ! used_after=$(cat $variable_used); then
+		exit_fail "error while reading ${variable_used}!"
+	fi
+	if ! slices_after=$(cat $variable_slices); then
+		exit_fail "error while reading ${variable_slices}!"
+	fi
+	if ! free_slices_after=$(cat $variable_free_slices); then
+		exit_fail "error while reading ${variable_free_slices}!"
+	fi
+	if ! small_files_after=$(cat $variable_small_files); then
+		exit_fail "error while reading ${variable_small_files}!"
+	fi
+	if ! [ "$((free_slices_before - 2))" -eq "$free_slices_after"  ]; then
+		exit_fail ">>error while counting $variable_free_slices: $free_slices_before $free_slices_after"
+	fi
+	if ! [ "$used_before" -eq "$used_after"  ]; then
+		exit_fail ">>error while counting $variable_used: $used_before $used_after"
+	fi
+	if ! [ "$((small_files_before + 1))" -eq "$small_files_after"  ]; then
+		exit_fail ">>error while counting $variable_small_files: $small_files_before $small_files_after"
+	fi
+	if ! [ "$((slices_after))" -eq "$slices_before"  ]; then
+		exit_fail ">>error while counting $variable_slices: $slices_before $slices_after"
+	fi
+
+	if ! slices_before=$(cat $variable_slices); then
+		exit_fail "error while reading ${variable_slices}!"
+	fi
+	if ! free_slices_before=$(cat $variable_free_slices); then
+		exit_fail "error while reading ${variable_free_slices}!"
+	fi
+	if ! small_files_before=$(cat $variable_small_files); then
+		exit_fail "error while reading ${variable_small_files}!"
+	fi
+
+	dd if=/dev/urandom of=$mntb/file2 bs=128 count=1 oflag=append conv=notrunc 2>/dev/null
+	dd if=/dev/urandom of=$mntb/file2 bs=128 count=1 oflag=append conv=notrunc 2>/dev/null
+	dd if=/dev/urandom of=$mntb/file2 bs=128 count=1 oflag=append conv=notrunc 2>/dev/null
+
+	if ! slices_after=$(cat $variable_slices); then
+		exit_fail "error while reading ${variable_slices}!"
+	fi
+	if ! free_slices_after=$(cat $variable_free_slices); then
+		exit_fail "error while reading ${variable_free_slices}!"
+	fi
+	if ! small_files_after=$(cat $variable_small_files); then
+		exit_fail "error while reading ${variable_small_files}!"
+	fi
+	if ! [ "$((small_files_before))" -eq "$small_files_after"  ]; then
+		exit_fail ">>error while counting $variable_small_files: $small_files_before $small_files_after"
+	fi
+	if ! [ "$((free_slices_before - 3))" -eq "$free_slices_after"  ]; then
+		exit_fail ">>error while counting $variable_free_slices: $free_slices_before $free_slices_after"
+	fi
+	if ! [ "$((slices_after))" -eq "$slices_before"  ]; then
+		exit_fail ">>error while counting $variable_slices: $slices_before $slices_after"
+	fi
+
+	umount $mnta
+	umount $mntb
+
+	for dev in vda vdb; do
+		if [ -d "$sysfs/$dev" ]; then
+			exit_fail "$sysfs/$dev still present after unmount!"
+		fi
+	done
+
+	rmmod $modulename
+
+}
+check_memory_leak() {
+	set -x
+	check_ouichefs_basic_behavior
+	check_ouichefs_fio
+	check_sysfs_structure
+	check_simple_write
+	check_remove
+	check_coexistence_trad_fs
+	check_spanning_multiple_slices
+	check_ouichefs_basic_behavior
+
+	echo scan > /sys/kernel/debug/kmemleak
+	sleep 60
+	if [ -s /sys/kernel/debug/kmemleak ]; then
+		cat /sys/kernel/debug/kmemleak
+		exit 1
+	fi
+}